BaTiO3/YBa2Cu3O7−&dgr;  bilayer structure has been epitaxially grown on a LaAlO3(100) substrate by pulsed laser ablation with sintered YBa2Cu3O7−&dgr; and single crystal BaTiO3targets. The analysis of the BaTiO3/YBCO bilayer structure by x‐ray diffraction (XRD) 2&thgr;/&thgr;,w, and &fgr; scans as well as high resolution electron microscopy indicates that the bilayer thin films have a high degree ofc‐axis‐oriented epitaxial crystalline structure. The surface morphology of the thin film was observed by scanning electron microscopy. ©1995 American Institute of Physics.